The Makita DMR107 Job Site Radio runs on both an AC adaptor and Makita Li-ion batteries. The 2 large speakers provide high-quality sound. There is an AUX-IN jack for connecting to external audio source (connecting cable is not included). The elastomer bumpers protect against rough handling and have a falling impact strength of 1.0m. Other features include a digital tuner, AC adaptor jack, retractable antenna and it is showerproof (withstands up to 5 minutes exposure to rain), IP64 rated. Newly compatible with 10.8V CXT slide batteries. NOT compatible with G-Series Battery or NiCad or NiMH Batteries. Comes as a Bare Unit, No Battery or Charger. Specification Range: FM 87.5-108MHz, AM 522-1629kHz Battery Type: Lithium-ion Battery Range: 7.2-18V Weight: 4.4kg